Device for chucking blanks in gear-rolling machines.



H. N. ANDERSON; DEYICE FOR CHUCIHHG BLANKS IN GEAR ROLLING MACHINES.

KFFHCM'ION'FILED JUNE-22. I914- Patented May 28,1918.

2 SHEETSSHEET l I Mir/Q 31mm,

EANDEHSGN, E CLEVELAND. GHIO. ASSIGNOR TO THE ANDERSON ROLLED MPANY, 0 CLEVELAND, OHIO, A CORPORATION OF OHIO.

539R CHUCKIK'G BLANKS IN GEAR-ROLLING MACHINES.

Specification 01 Letters Patent.

Eutented May 28, 1918.

Application filed June 22, 1914. Serial No. 846,516.

To whom 53 may concern:

ids it known that l, HAROLn N. iNoEnsoN, aciti-zen of the United States, residing at Cievelend, in the county of Cuyuhoge and e State oi": Ohio, have invented a new and useiulDevice "for Chucking Blanks in Gear- Eollinq Machines, of which the following is specification.

My present invention relates to machines for rolling teeth on gear wheels, and one or its object is to provide means for chucking pinions of small diameter, particularly where they have a relatively broad face. Anctlur object is to provide for chucking goers heriug rel tively large bores; or ring Another object is to insure that the does not slip in the chuck. Another is to prevent gears having large bores expanding under the action of the die, I. S. Patent No. 1,001,799, issued to me est 29, 19L. T disclosed a machine in teeth were formed on the blank by a ry die, while in an application co-peuderewiot-h Serial No. 643,010, 1 have cred a machine in which the teeth are rolling the blank against a tool; ed rack. in the patent referred to the blank was clamped between opposing disks, end one of objects of the present improvement is to insure the rotation of e blank thus mounted without subjecting the r ngs to excessive end thrust. These ob- :ind others which will appear later, accomplished by means of the follow in ..'ch:

Fignre 1 shows a device for mounting a- 3 ;.inion 1 large bore and broad 'fncc. 1 shows a modified arrangement pern'nt the arbor to be u'isei'ted t s put in the machine.

on oi line "i oi l.

the. blank. morliiicutiou of Fig. l, in n is excited and the blank is as not here Fig. 5 shows ihe manner of mounting :1 ring; gear.

Fig". 6 shows one of the disks used in mounting a pinion having a large bore and broad face. In this a tapered arbor carries a member 96 having a tapered socket. The taper of the socket is opposite to that of the arbor and is adapted to receive a tapered hub 97 on the gear blank. The member 26 rigidly secured to the urbor. Making the arbor and member 26 of separate pieces instead of one piece simplifies the work of constructing them. The outer end of the arbor is turned to cylindrical form and enters a suitable recess in the clamping member 28, said member having a tapered re ccss adapted to fit over the hub 29 on the other end of the blank. A feather 25 on the arbor enters a key way 28 in the clamping member and insures its rotation in unison with the arbor. It will be understood that the arbor and member 28 are suitably mounted and means provided for pressing the clamping members toward each other, but as means for doing these has been shown in the patent referred to no description is deemed necessary here. The arbor is provided with longitudinal ribs 30, and the walls of the sockets have ribs 31. In the patent referred to the disks between which the blank is clamped arepressed together with ahaud wheel. The construction is such that pressure applied to hold the blank reacts on the bearings and consumes power. The advantage of providing the clamping members with driving ribs is that after sullicieut force has been applied to sink the ribs into the blank the pressure may be relaxed slightly to relieve the bearings.

in Fig. 1, 32 indicates the die. which may be circular or rcctilincul, and 33 represents blank. The blank is provided with hubs 97 and 99. which may if desired be out oif utter the teeth are finished. The hubs serve the double purpose of adding to the surface -vzlublc for indentation by driving ribs, and resisting the tendency of the blank to cxpund under the action of the die. The hubs cannot expand when encompassed by the clumping members -6 and 28 and by x'iz't in ct their intcgnii'y with the blank they pi-cveui its expzmsion. Under some circumsfuuccs the arbor may be dispensed with and blank supported and driven entirely by l members.

ant. No. 1,661,799 above rebin oi; is clamped between disks memes the blanln an arbor which fixed with refto one of said members adapted to hrough a central bore in the blank into "renee bass t an axial recess in the bottom of the recess, and means for causing the wig member to rotate in mmor mounting blank in a me, comprising a pair of hers having sockets to fit over hubs on the blank, an arbor which is fixed 1: one of said members adapt ccl to pass through a central bore in the blank and into an axial recess the bottom of the opposite socket, means for causing the opposits clamping member to rotate in unison with the arbor, and longitudinal ribs on the arbor and in the sockets.

14. A device for mounting a blank in a gear rolling machine, comprising a pair of clamping members having tapered sockets to it over hubs on the blank, a tapered arbor which is fixed With reference to one of said. members adapted to pass through a central bore in the blank and into an axial recess in the bottom of the opposite socket, means for causing the opposite clamping member to rotate in unison with the arbor, and longitudinal ribs on the arbor and in the sockets.

15, A device for chucking a blank in a gear rolling machine comprising a pair of members between which the blank is clamped and an arbor connecting the two members, said arbor having longitudinal ribs.

HARGLD N. ANDERSON. Witnesses Gsoaon Bnnmm, PAUL JACOBSON. 

